.. I personally don't use anti-aliasing... but, you may have or you were use to it?...
so, your system settings may have been changed?
System Options / Display/Selection / Anti-aliasing
or your graphics card settings may have been been changed?
(depending on card/driver.. you'd need to nvidia control panel or amd control center to access anti-alias settings)
Did you check to make sure the text is actually still text? I actually just searched on here to try and figure out why all my Bauhaus text within the title block was converted to images. I have had Bauhaus in one customer's title block for a long time, and tonight I noticed it got grainy / blocky. When I looked at it 10 minutes ago, it was no longer text, it was an image, and Bauhaus font is not available in SW even though it is installed in Windows.
Great stuff paul, thank you. I would never have got there alone.